Thomas Eduard Mittler (September 18, 1928–March 13, 2012) was an Austrian entomologist who primarily researched the diets of insects, particularly aphids.
In England, he attended Imperial College London, graduating with a bachelor's degree in zoology in 1949.
He then attended the University of Cambridge for his PhD under entomologist Vincent Wigglesworth, graduating in 1955.
His doctoral research centered on the diet and nutrition of sap-feeding insects, especially aphids.
[1] At Berkeley he continued his studies of aphid diet; with Reginald Dadd, he defined the first completely chemically defined artificial diets for aphids, based on their previous studies of the chemical composition of sap.